/*
 * Copyright (c) 2007 IBM Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.amino.ds.lockfree;

/**
 * interface definition of stack.
 *
 * @param <E>
 *            type of element in stack
 */
public interface IStack<E> {
    /**
     * @return element peeked
     */
    public E peek();

    /**
     * @return element popped
     */
    public E pop();

    /**
     * @param e element pushed
     */
    public void push(E e);

    /**
     * @return true if stack is empty, otherwise false
     */
    public boolean isEmpty();
}
